Cylinder testing and priming device.



G- KITCHEN, JR. CYLINDER TESTING AND PRIMING DEVICE.

' APPLICATION FILED DEC. 16. 1915.

.1 ,1 98,643. Patented July 25, 1916 gwuemtoz GEORGE KITCHEN, J31,IGIIELCE, MICHIGAN.

CYLINDER TESTING- .flhll) PEIPdElEd DEVICE.

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Specification of Letters E'atent.

Patented July 25, 19%.

Application filed December 16, 1915. serial lilo. 67,231.

vices, of which the following is a specification.

This invention relates to new and useful improvements in cylindertesting and priming devices. p The primary object of the presentinvention is the provision of a form of valved priming cup for anexplosive motor capable of being employed to position an air pres suregage for ascertaining the compression conditions of the cylinder. v

A further object of the device is to provide the separate cylinders of amotor with suitable valves communicating with the cylinders and havingremovable priming cups whereby an initial charge of the explosive fluidmay be injected into the cylinders.

while upon removing any of the cups, a fluid pressure gage may bepositioned to take the place thereof for the purpose of registering thedegree of compression exerted by the motor pistons during the activeoperation thereof.

The invention. broadly contemplates the provision of priming cup valvesupon all of the cylinders of a motor, the cups of which valves may bereadily removed and replaced one after another by a pressure gage andwhereby the (amount of pressure within the cylinder will'be accuratelyindicated during the operation of the motor. A saving of gasolene willthus be efiected by noting the difi'erence in compression of theseparate cylinders which will indicate leakage and will allow the motorto be repaired. so that the separate cylindersthereof may have an equaldegree of compression and consequently exert uniform power upon thecrank shaft and uniform running of the motor.

With these general objects in view and others that will appear as thenature of the invention is better understood, the same consists in thenovel combination and arrangement of parts hereinafter fully described,illustrated in the accompanying drawings and then claimed.

In thmdravi ings forming a part of this application and in which likedesignating characters refer to corresponding "perils throughout theseveral views :-Figure' 1 is a side elevation of a four cylinder motorillustrating the manner of employing the present device in connectiontherewith. Fig. 2 is a vertical transverse sectional view lid throughthe top portion of one of the cylinders provided with the presentdevice, the cup of the latter being similarlys wn in section.-

- Fig. 3 is anvelevational view t iereof with a pressure gageillustrated in place of the priming cup shown in Fig. 2, and Fig. 4c isa perspective view of the priming cup detachcd.

The present device being primarily em ployed for testin cylinders andbeing in the form of a separaile priming cup and valve, the same isherein illustrated in connection with the double cylinders 10 of anexplosive motor or engine 11. It will be understood that each of thedouble cylinders 10' provides two separate vertically arranged pistonchambers 12 therein, each having a slidably arranged operating piston(not shown) after the usual manner.

The top or end head 13 of each of the cylinders is provided with a valvebody 14-. of the usual form-screw-threaded into an opening 15 of thesaid head the communication with the piston chamber 12 being controlledby means of the turn plug 16 having an op erating handle 1?.

A reduced stem or nipple 18 externally screw-threaded projectsvertically from the upper side of the valve body 14, an annular shoulder19 being provided on the said body surrounding the said stem. A primingcup 20 is provided of the form best illustrated in Fig. i of thedrawings-and having an internally threaded boss 21 at the base thereofadapted to be removably positioned upon the stem 18 and screwed downinto engagement with the shoulder 19 whereby. the upper free end of thestem lies substantially flush with the inner face 22 of the receivingcontainer of the cup 20. I

It will be understood that the valve and cup hcreinbefore described may,when assembled, be employed after the manner of the usual priming cup inconnection with the initial admission of a charge to the ex.- plosionchambers 12 of the motor cylinders. When desired to employ the devicefor the purpose of testing the compression of the cylinder, the cup 20is unscrewed from the valve stem 18 and any form of pressure gage suchas the Edelmann tire gage 23 herein illustrated is attached to" the saidstem, replacing the cup. The cage 23 may nection with the present gageor, the air gage may be manually held in operative contact over the openend of the stem 18 after the manner employed with such devices as theTwitchell or the Schreader air gages in testing tire pressures. v

-VVhen the motor 11 is in operation and the gage 23 is thus secured tothe valve stem 18 of the valve body 14 of any of the cylinders, the saidgage 23 will at once indicate upon the dial 25 thereof the exact amountof compression exerted by the piston in the cylinder, thus denoting thedegree of compression of which that cylinder is capable. The said gagebeing thus employed in connec tion with each of the cylinders of themotor, the valve handle 17 being manipulated during the testingoperation, a record may be made of the compression in each cylinder andsuch record of the relative strength of each carefully kept.

The normal maximum degree of compression of the cylinders being known,the cylinders may be tested from time to time and in. the event of anymarked decrease in the compression of any of the same, the leakage ofthe compression may be remedied either-in connection with the piston,the

copies of this patent may be obtained for five cents each, by addressingthe valves or whatever other part. thereof is.

necessary and the motoriath'us restored to its complete capacity.

The present invention 1s in no manner confined to the form of valve,priming cup or pressure gage herein illustrated, but while the form ofthe invention herein shown and described is what is believed to be thepreferable embodiment thereof, it is nevertheless to be understood thatchanges may be made in the form, proportion and details of constructionwithout from the spirit and scope of the as hereinafter claimed.

What I claim as new is A cylinder testing device comprising incombination with a cylinder having an explosive chamber therein, a valveremovably carried by the said cylinder in direct communication with thechamber thereof, an externally threaded fluid pressure gage receivingstem projecting outwardly of the said valve in axial alinementwith theline of communication between the said valve and chamber and providingan annular shoulder upon the valve surrounding the said stem, and apriming cup having a threaded boss at its base end adapted for mountingon the invention departing said stem in seated engagement with the saidannular shoulder.

In testimony whereof I aflix my slgnature.

GEORGE KITCHEN, JR.

Commissioner of Patents,

Washington, D. G.

